Postby ukrailblog » Wed Apr 26, 2017 2:07 pm
These are the numbers for 2015 (from Headshrinker):
Battersea: CONSERVATIVE 26,730, Labour 18,792, Lib Dem 2,241
Wimbledon: CONSERVATIVE 25,225, Labour 12,600, Lib Dem 6,129
Putney: CONSERVATIVE 23,018, Labour 12,838, Lib Dem 2,717
Streatham: LABOUR 26,474, Conservative 12,540, Lib Dem 4,491
Tooting (from 2016): LABOUR 17,894, Conservative 11,537, Lib Dem 820
But these are the numbers from 2010:
Battersea: CONSERVATIVE 23,103, Labour 17,126, Lib Dem 7,176
Wimbledon: CONSERVATIVE 23,257, Lib Dem 11,849, Labour 10,550
Putney: CONSERVATIVE 21,223, Labour 11,170, Lib Dem 6,907
Streatham: LABOUR 20,037, Lib Dem 16,778, Conservative 8,578
Tooting: LABOUR 22,038, Conservative 19,514, Lib Dem 7,509
As can be seen, 2015 was a historic low for the Lib Dems. Notably in Streatham they even ran Labour close, and in Wimbledon they also beat Labour to second.
Ultimately though, this is not a normal general election, and normal rules don't apply. Labour is abnormally weak (very few prospective MPs support Corbyn) and have no sensible position on the EU, while the Lib Dems are still recovering from virtual wipeout yet are the only ones who are clearly pro EU.
Finally, the opinion polls have always been good at predicting Labour vs Conservative and less good at predicting the influence of the Lib Dems. See the last election, where the opinion polls missed the disappearance of the Lib Dem vote in the South West that gave Cameron his majority government.
Thus, we can reasonably use the opinion polls to conclude that almost nowhere will see the Labour vote increase (it should decrease almost everywhere if the polls are right). But based on the historic evidence of polling success/failure, we simply can't use the polls in the same way to predict what the Lib Dem vote will do (a few % increase nationally could mean nothing, or that extra support could be very focussed and thus return Lib Dem MPs, the polls just can't tell us that).
In summary, past voting history in a constituency is probably not as good a guide to the result this time as it normally is.